Before diving into the button combinations, it is important to distinguish between a simple restart and a hard reset.
A hard reset (factory reset) erases all Wi-Fi credentials, pairing data, user timers, and custom settings, restoring the device to its out-of-box state. Unlike a soft reset (power cycling), this is irreversible for settings and requires reconfiguration via the Mi Home / Xiaomi Home app. Hard Reset XIAOMI Smart Air Purifier 4 Compact
Ensure the filter cover (bottom/side compartment) is securely closed. The Xiaomi 4 Compact has a safety switch that disables the fan and buttons if the rear cover is ajar. Click the cover firmly into place. Before diving into the button combinations, it is
Technically, this is not a "hard" reset, but it is often confused with one. If your device is still connected to the app but you want to wipe it clean, use this method. Note: This does not fix Wi-Fi glitches if the device is offline. Technically, this is not a "hard" reset, but
However, even the most reliable smart devices encounter glitches. Perhaps your purifier won’t connect to Wi-Fi, the fan speed is stuck, the display shows an error code you cannot clear, or the device is unresponsive to the touch panel. When standard troubleshooting fails, a (sometimes called a factory reset or force restart) is the ultimate solution.